CN1071144C - Electronstatic spraying device - Google Patents
Electronstatic spraying device Download PDFInfo
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- CN1071144C CN1071144C CN94193195A CN94193195A CN1071144C CN 1071144 C CN1071144 C CN 1071144C CN 94193195 A CN94193195 A CN 94193195A CN 94193195 A CN94193195 A CN 94193195A CN 1071144 C CN1071144 C CN 1071144C
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- capillary
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- tube
- container
- spray tip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/0255—Discharge apparatus, e.g. electrostatic spray guns spraying and depositing by electrostatic forces only
Abstract
An electrostatic spraying device is provided with a container (16) for the liquid to be sprayed and a capillary structure (22) extending into the container. To maintain a substantially constant liquid level at the location where liquid is drawn into the capillary structure, the container is partitioned into two chambers one (68) of which is isolated from atmosphere and the other (66) of which is in communication with atmosphere. The capillary structure extends through one chamber and the arrangement is such that the liquid level at the location where the capillary structure communicates with the liquid is maintained substantially constant over a wide range of variation of the liquid level within the other chamber. The upper end of the capillary structure may be provided with an oblique end face (50; 70, 72) to facilitate dispersal of the spray into the surroundings.
Description
The present invention relates to the electrostatic spraying of liquid, particularly relate to liquid is ejected into the device that goes in the surrounding environment, for example need provide or absorb fragrance with this liquid, or make under the situation that precipitations such as dust granule are arranged in the surrounding environment with this liquid at some.
A kind of such device has been disclosed among we the previous international monopoly PCT/GB92/01712, wherein use a kind of capillary pipe structure of forming by foamed material, this structure can be used to realize that the capillary on liquid is from a family expenses fluid storage tank in this device to spray tip carries, the highfield that is positioned between this tip and the environment at liquid on this spray tip pulls into liquidus, thereby this liquidus is broken into charged droplet and has formed spraying subsequently.Other this class device can be recognized from our previous European patent EP-A-486198 and EP-A-120633.
A problem using this class device to be run into is how to obtain a liquid by the quite reliably flowing velocity of this capillary pipe structure to spray tip, because this transporting velocity is relevant with the liquid level of this fluid storage tank.If this capillary pipe structure is taked form capillaceous, for example disclosed like that in EP-A-486198, diameter capillaceous is big more, this device is also just responsive more to the variation of the liquid level in the fluid storage tank, and the result makes the atomization quality of this device produce significant the variation when the liquid level in the fluid storage tank descends.
In PCT/BG92/01712 and EP-A-486198, this problem is resolved by the fluid storage tank that adopts a short and thick shape container.But be to use this shapes of containers to tend to this Design of device is produced restriction.
The present invention relates to being disclosed in the improvement of this class device in the above-mentioned previous patent specification.
The content of one aspect of the present invention provides a kind of electrostatic spraying (mist) device, this device comprises the container of an electrostatic spraying liquid, a capillary structure for conveying, the one end is arranged in this container and an one opposite end forms the spray tip (or link to each other with a spray tip) of this device in use, and the device that is used for controlling liquid level in this fluid storage tank in this container.
The content of a second aspect of the present invention provides a kind of electrostatic spraying (mist) device, the container that comprises an electrostatic spraying liquid, a capillary structure for conveying, the one end is arranged in this container and an one opposite end forms the spray tip (or combine with a spray tip) of this device in use, and the device that in this container, is used for controlling liquid level in this fluid storage tank, this control device can make the liquid level of capillary pipe structure in the position that enters liquid keep constant substantially at least when the amount of liquid in this container is in preset range.
This container, capillary pipe structure and device preferably include in a removable tube.
This liquid height at least the amount of liquid in this container fall this container the design liquid capacity 40% before unaffected substantially for desirable, 30% is better, is preferably 20%.In fact, the present invention still can keep this liquid level constant substantially up to this container during near emptying.
In one embodiment of the invention, this device comprises a separator, this separator is separated into two chambeies to the inside of this container together with the liquid in this container, basically first chamber and second chamber that is connected with external container that isolates with external container, this capillary pipe structure is configured to pass this second chamber and extends out, thereby liquid can be transported on this spray tip by the bottom surface of this capillary pipe structure from this second chamber.This separator is suitable makes tubulose, thereby first chamber is then limited by this tubulose separator by annular second chamber.
Except container shapes, the others of apparatus of the present invention are identical with disclosed device among we European patent EP-A-468198 formerly basically, and its whole open files can be used as a part of the present invention by reference.
This capillary pipe structure can adopt capillary material or take the form of a pipe.In the back in this case, this installs best manufactured and be configured to and can work in following this mode, be the end face that liquid was suctioned through this spray tip, and penetrate from this pipe with the form of one or more liquidus that these liquidus are broken subsequently and form spraying by electrostatic interaction.
To penetrate from this spray tip with the form of liquidus array by this liquid, this liquidus stretches out from the marginal position (or near this position) that this pipe outer round surface intersects, and these liquidus along the circumferential direction separate a distance each other.Because this liquid sprays with the form of liquidus array, thereby the more drop injection of minor diameter may obtain to spray with wall scroll liquidus form than liquid the time.
Be deposited on the very near surface of this device in order to improve the jet spread of surrounding environment and to reduce drop, the opposite end of capillary pipe structure is preferably asymmetrical shape, with the side injection of convenient liquid from this structure.Like this, just might guarantee that this injection sprays with the direction that more approaches vertically upward, thereby improve distribution.
The content of another aspect of the present invention is to provide a tube in (or being) Elecstrostatic spraying apparatus, this comprises the container and the capillary that are used for storing atomizing of liquids, one end of this pipe is located in the container and its another opposite end forms the spray tip of this device in use, and its characteristics are that this opposite end capillaceous is that asymmetrical shape is to help the side atomizing of liquids from this pipe.
Preferably the end face of this opposite end capillaceous extends so that provide asymmetrical shape of this pipe between the just in time opposite both sides of this pipe obliquely, and it is favourable front end from this injection that the result makes this pipe have one in the one side.
Usually this front end has one significantly less than 90 ° angle, and its typical range is (for example 40～50 °) within 30～60 °, so that strengthen the electric field at this favourable eject position place.
In a certain embodiments, an Elecstrostatic spraying apparatus comprises a spray tip, a fluid storage tank that is used for being equipped with the liquid of supplying with this spray tip, one capillary one end is positioned at this fluid storage tank and its other end forms this spray tip, thereby and is used for high pressure is acted on the device that the liquid that penetrates from this spray tip is atomized under effect of electric field.This capillary, fluid storage tank and voltage acting device are included in the housing, and this housing is suitable for stably being installed on the position, and capillary is laid up and by capillarity liquid is transported on this spray tip from fluid storage tank in this housing.
Preferably this capillary is made with nonmetallic materials, and can apply voltage with the effect by the liquid in the capillary to the liquid on this tip end by the voltage acting device is connected with liquid in the fluid storage tank.Shock hazard to the user has just reduced like this, because capillary is nonmetal and the interior fluid column of capillary can be used as the resistance that suppresses the electric shock generation.Need not also in addition to consider that very adorning an electric field near this spray tip place in this device adjusts electrode.
Usually this liquid will penetrate from this spray tip with the liquidus array format, this liquidus stretches out from the marginal position (or near this position) that this pipe end face and this pipe outer round surface intersect, these liquidus along the circumferential direction separate a distance each other and are limited in jointly in the part circumference range at this edge, and promptly this part comprises this front end.
It is a round section basically that this capillary can (be not must) not be made in it and/or neighboring, it is made up of nonmetallic materials usually, can obtain enough capillary water heights thereby particularly have enough wetabilitys relevant with this atomizing of liquids.
This capillary can have smooth outer round surface.This device in use, best position capillaceous can make the liquidus that penetrates from spray tip at least mainly along vertically upward direction.In some cases, for being deposited on very close to the lip-deep danger around this device, liquid droplets reduces to minimum, obtain the high efficiency distribution of environment liquid droplets towards periphery, particularly when this device being used for the injection water plane surface for example when table top or shelf, preferably adjust capillary and make its axis tilt to vertical direction, so that liquidus penetrates along vertical substantially direction.
For the ease of making, the end face that this inclination capillaceous is extended in one embodiment of the invention can be the plane basically.
In another embodiment, this end face has more complicated shape, and it comprises first plane with second Plane intersects, and the intersection between these two planes is positioned at this side capillaceous, preferably is positioned at radially outward locating of capilar bore.The embodiment of back is specially adapted to the bigger occasion of wall ratio capillaceous.In this case, if this end face is the surface that a single inclination is extended, what this moment, liquid must be through this end face is long and the danger that liquid can not ample supply injection edge arranged to this segment distance that sprays edge (this edge is that the intersection by this end face and outer round surface capillaceous is formed) from capilar bore.Will influence ejection efficiency in this case.Limited by the inclination extensional surface that intersects by the shape with this end face, the distance that liquid is walked just can shorten.
Shown in EP-A-486198, characteristics of apparatus of the present invention are that this spray tip is positioned to usually and needs positive head vertically upward and not, and promptly this spray tip does not need to be placed on the position that is lower than the liquid level in this or the fluid storage tank.
This device can be placed on the horizontal plane, in the case it should have one flat or be used for and the horizontal plane contacting structure, therefore this device should be located by following manner, promptly tube is inserted wherein and makes capillary pipe structure be positioned at the upright position, and make the spray tip of this pipe be positioned at the highest position.Perhaps can go up this device from a vertical plane (for example wall) suspendedly, a suspension arrangement should be housed on this device in this case, this suspension arrangement should be configured to make this device orientation rightly in use.For example, the housing of this device can comprise a wall contact surface, and this surface can guarantee that together with suspension arrangement this capillary pipe structure can be directed rightly when this housing is installed on the wall.
Usually the body resistivity of suitable atomizing of liquids is about 10
4～5 * 10
7Ohmcm.
Take at capillary pipe structure under the situation of pipe, preferably this pipe meniscus that should select to make liquid in this pipe at the wall thickness at place, this tip is short thereby can pass this wall thickness and produce a steep potential gradient with the distance between this pipe outer circular edge, and this is for guaranteeing that liquid is very important from meniscus sucking-off, the part (liquid promptly sprays from here) of passing the end face at tip and moving towards the spray tip circumferential edges.Potential gradient is present between these positions in the time of can believing work, because the possibility that corona discharge takes place is arranged at the acute angle front end place of this pipe, and compares at the current potential at liquid meniscus place, and this will cause the electronegative potential in this position.The wall thickness at the most advanced and sophisticated place of general this Guan Zaiqi is not more than 1 millimeter, preferably is not more than 500～600 microns.Usually wall thickness that should the tip is not more than 400 microns, is more preferably to be not more than 250～300 microns and also can be not more than 100～150 microns.Therefore this capillary preferably has an edge or an enough sharp-pointed fillet structure, thereby can produce corona discharge to a certain degree and then develop into aforesaid potential gradient down in this Design of device operating voltage (usually in 5 kilovolts～15 kilovolts scope).
As mentioned above, if the form of many jets of the liquid on this spray tip or liquidus penetrates, just can obtain undersized drop.This can select this pipe by following method and realize at the wall thickness at tip place, promptly should make at the potential gradient at the front end place of this pipe enough high to guarantee the many jets injections opposite with the one-jet injection.
In order to guarantee that the whole amount of liquid in this basically can be by electrostatic spraying emptying from this tube, this capillary preferably should extend upward at (or approaching) this bottom position.
A problem relevant with utilizing Elecstrostatic spraying apparatus capillaceous is that for example capillary water height, electric field-enhanced and liquid come the refin tubule to the transmission speed of spray tip according to some factor.
The content of another aspect of the present invention has provided a kind of Elecstrostatic spraying apparatus, comprise a spray tip, a fluid storage tank that is used for being equipped with the liquid of supplying with spray tip, one capillary, the one end is positioned at this fluid storage tank and its other end forms this spray tip, and is used for high pressure is acted on this liquid so that the device that the liquid that penetrates from this spray tip is atomized under electric field action.This capillary, this tank and voltage acting device are included in the housing, this housing is suitable for stably being contained on the position, capillary is laid up and by capillarity liquid is transported to from fluid storage tank on this spray tip in this housing, its characteristics are that this capillary comprises first capillary portion that this end of second capillary portion of ining succession from behind extends, second capillary portion ends at (or close) this opposite end capillaceous and has a hole, and the sectional area in this hole is less than the sectional area in hole in the first.
Under the identical situation of other factors, capillary diameter is a key factor for the electric field-enhanced of spray tip place, and is more little at the capillary external diameter at spray tip place, and near the electric-force gradient this tip is just big more.But be greater than major diameter fluid resistance capillaceous than the capillary of minor diameter for the fluid resistance of liquid flow, ensue electric field-enhanced by reduce liquid to the transporting velocity of spray tip (with the major diameter capillary comparatively speaking) compensate.
The capillary that use has two parts of different sectional areas makes and comes the refin tubule more convenient as required.The present invention's reinforcement electric field that can obtain to strengthen and don't transporting velocity produced obviously influence particularly, the reinforcement electric field of reinforcement can obtain hang down fluid resistance by this second portion can pass through this first's acquisition.In addition, this second portion by its hole of suitable selection section size and/or select the length in its hole to make accurate adjustment to the liquid transporting velocity.
Usually the external diameter of this capillary first is 400～800 microns, and internal diameter is 200～300 microns.The decision of the second capillary portion size should make the flow that flows to spray tip for being not more than 0.1 ml/min usually, and it is then better generally to be not more than 0.01 ml/min, preferably in 0.0001～0.01 ml/min scope.The external diameter of general this second capillary portion is 200～400 microns, and internal diameter is 50～100 microns.
This first and second capillary portion is preferably made an integral body mutually.The short-cut method of realizing this point is to form thin neck by just capillary with even section to produce and have with the first of even section same size and form a venturi portion of second capillary portion.This distortion is to be easy to realize when capillary is made (for example nylon) with plastic material, promptly just can form thin neck in this end by the pulling force of an end effect at this pipe.And then this venturi portion is cut into or is processed into the asymmetrical shape that the front has been addressed.
An Elecstrostatic spraying apparatus of the last explanation of the present invention also can include many characteristics in the content aspect illustrate previously several of the present invention.
The present invention will be described by example below with reference to accompanying drawings, wherein:
Fig. 1 is the sketch that static air of the present invention increases bright device;
Fig. 2 and 3 is different spray tip structure diagrams;
Figure 4 and 5 are other alternative spray tip structure diagrams.
Referring to Fig. 1, this air increases bright device and comprises housing 10 and diapire 12, and this diapire is used for being bearing on the mean level face (for example table top, shelf first-class).Housing 10 has a chamber 14, lid 15 is just taken away and can be entered this chamber, thereby tins 16 of atomizing of liquids is housed just can inserts in this chamber.This liquid is a kind ofly to be applicable to electrostatic spraying and should to select for use its characteristic to be applicable to the liquid of this device purposes that promptly this liquid should have the characteristic of fragrance.As described in our European patent EP-A-486198, tube 16 can be short parallelepiped structure, but also to further specify as following, after leveling device of the present invention is housed, the importance of this profile has just reduced, and as shown in drawings, this can take the shape of a microscler vertical container so that help to reduce restriction to the configuration design of this device.Tube 16 is placed in the chamber that is limited by sidewall 17 and diapire 19.Capillary device 22 (it can take the pipe form but also can be among the PCT/GB92/01712 disclosed capillary material for example foamed material or as disclosed fibrous material or plastics among the EP-A-120633) be loaded in this tube, its is positioned to sentence to make to infeed near diapire 18 by vertical installation the (promptly usually perpendicular to the horizontal bottom wall 18 of tube) and its lower end and manages 22 liquid and remain on liquid level near diapire 18 usually.The lid 24 that tube is passed in the upper end of capillary 22 stretches out, and lid 15 has aperture 25.
Tube 16 is suitable as the fastener that the high pressure of liquid and high pressure generator 28 is wherein exported.This fastener can obtain by various distinct methods, described in European patent EP-A-486198; In the illustrated embodiment, this tube by a kind of electrically insulating material for example nylon material make, and the tube on an electric contact 30 is housed.It is in the chamber on boundary the time that the position of electric contact 30 should be placed on when tube is correctly inserted with sidewall 17, and electric contact 30 should be able to be aimed at the electrode 32 of the high-voltage output end that is connected generator 28.
The low-pressure end of generator 28 is connected with the low-voltage circuit that comprises one or several battery (being generally 9 volts) and can closes 44 by the worker of user's operation and opens or closes.Generator 28 produces the high pressure output (voltage is about 5～15 kilovolts usually) of a little electric current, thereby this high pressure is applied on the liquid in the tube 16 and makes liquid come out to produce electrostatic spraying from managing 22 in use.Low-voltage circuit 40 is used for controlling this generator and and then can controls injection as requested.This low-voltage circuit has diapire 12 ground connection of a lead-in wire by this housing.
When needs vertically supply to the uppermost tip of this capillary to liquid when getting on from this tube, capillary 22 is fit to be used to provide enough capillary water height and irrelevant with the liquid level in the tube.Just can accomplish this point by suitable selected capillary size and manufacturing material capillaceous.Suitable material is for example nylon, polyolefin, polyacetals, polyether-ether-ketone or a polytetrafluoroethylene (PTFE) of polymeric material, and these materials can both be wanted the one-tenth branch of atomizing of liquids moistening fully, and promptly contact angle should be substantially zero.Capillary 22 has an aperture (can be circle section or other sections) and relatively thinner wall usually. still, if this tube is not short and thick shapes of containers, if capillary 22 has bigger diameter, be transported to so liquid that spray tip goes tend to the liquid levels in the tube 16 are changed responsive, unless other steps that will introduce below taking.
In use, liquid is transported to the uppermost most advanced and sophisticated place of this pipe by the capillarity of this pipe fully, be drawn as liquidus at this place's liquid by the high pressure that is applied thereto, this liquidus flows out from the tip of pipe and is broken into charged droplet, and these droplets are in earthy object and structure leave directive again from the tip of pipe around.Usually, this device uses in the room, so wall, ceiling and ground will be as the targets far away that is sucked out droplet.
This wound packages has the device that is used for controlling liquid level in the container.In detail, the liquid level that enters this position at liquid place at capillary pipe structure is controlled so that the liquid level in this position remains unchanged basically, till the nearly emptying state of this socket joint.This device is realized by tubulose separator 60 in the illustrated embodiment, and this separator inserts in the tube with tight fit by the import 62 of tube 16, thereby provides a sealing in this zone.Pipe 60 is in its lower end end position and diapire 18 distance of being separated by.This pipe 60 is used for this inside is separated into two chambeies together with the liquid in the tube, promptly manages the upper plenum 66 of 60 inside and the upper plenum 68 of pipe 60 outsides.
In normal work period, this liquid level also has less variation, because liquid often is attended by foaming around pipe 60 lower end air during sucking-off from upper plenum 66 to upper plenum 68 by capillary 22 from this.This foaming will be disturbed the liquid level of pipe 60 lower ends, but can not have a strong impact on ejection efficiency.
The various parts that constitute tube 16 are that container, lid 24, separating tube 60 and capillary 22 etc. can be made with any suitable nonmetallic materials, for example selected a kind of plastics from aforementioned those materials.
In the illustrated embodiment, this tube shown in the figure has a flat wall 18, but in another embodiment (not shown), in order to guarantee before injection is forced to interrupt more effectively this tube of emptying, this diapire can be made the structure that concaves, and its minimum point is positioned at the below of capillary pipe structure.In the embodiment in figure 1, the inside of container is separated by the tubulose separator, should be understood that this separating also can take other form so that develop into pressure differential between two chambeies, to keep around liquid level capillaceous a constant substantially position and irrelevant with the variation of this internal tank amount of liquid.
When the upper end of capillary pipe structure 22 is processed to as disclosed square in European patent EP-A-486198, the improved spraying that is ejected into surrounding environment is scattered and can be realized by a capillary pipe structure with inclined end face as shown in Figure 1 is provided, thereby helps from the injection of one side.
Referring to Fig. 2, the upper end of capillary 22 is chamfered to its end face 50 is extended on the tangent plane of the different axial locations in edge and this pipe outer round surface, thereby forms the front end 52 of an acute angle.On position antipodal, formed the tail end 54 at an obtuse angle with it.Near this front end electric field just is reinforced like this, thereby helps from this locational injection.Usually the scope of the angle θ at front end place is 30 °～60 ° (for example 40 °～50 °).
In use, liquid sucking-off from pore 56 is passed end face 50 towards the outer periphery surface of this pipe.Because highfield is preponderated near front end 52, thereby preferentially the liquid of the marginal portion in front end 52 zones is pulled into many liquidus, and then liquidus is broken into many droplets and forms spraying.Usually liquidus penetrates from this edge to divide the angle that is positioned at liquidus formation position both side surface equally.Described more once such as we the patent EP-A-486198 of previous application, will be appreciated that utilize a unsymmetric structure to promote liquidus to form in a side of this pipe, this liquidus can spray with a subvertical angle.A typical liquidus illustrates with label 58.Eject by making liquidus approach vertical angle with certain on the spray tip, can obtain to be ejected into the more effective distribution of ambient atmosphere, and reduced this spraying and be attracted and be deposited on this lip-deep trend in device place, especially when this surface is in earth potential (being exactly this situation usually).From the liquidus that produces around front end area can also be by changing end face 50 the oblique angle and/or make pipe 22 suitably tilt to make it approach more to aim at vertical direction.In the latter case, should be understood that this maybe this device should be designed to go in this device to pass to required inclination this capillary later on when this wound packages.
Structure among Fig. 2 is suitable for that capillary has than the occasion of light wall pipe wall but the capillary pipe structure that can buy on many markets often has thicker tube wall (usually above 1 millimeter).If used this capillary, the distance between this pipe pore and this tube outer surface is because the ejection efficiency loss that takes place subsequently may be supplied with the situation that liquidus forms the unstabilizing liquid in district.In order to overcome this problem, can improve this end face capillaceous, this front end is positioned within this pipe outer round surface.
Therefore, as shown in Figure 3, this end face limits by intersecting two planes 70 at leading edge 74 places and 72, and this leading edge helps the formation of liquidus and is positioned within the outer round surface of pipe 22 (except its two ends).Generally manage distance between the outer round surface less than this hole and this in the distance between pore 76 and the leading edge 74.By this pipe end face is shaped, the spray line of this liquidus can approach to aim at vertical direction (for example shown in the liquidus 78) more and need not this pipe as can be seen.
Though do not illustrate among the figure, when this installs the not time spent, a cover is housed usually on pipe 22 so that its end face is covered in, preventing the drying of composition on this end face, otherwise will produce adverse effect to ejection efficiency.
In order to improve the conveying of liquid, can do further change to the structure of capillary 22 to spray tip.Referring to Fig. 4 and Fig. 5 (among the figure same label be used for respectively representing with Fig. 2 and 3 in identical part), this capillary 22 comprises two parts, and what promptly extend to this inside has than the first 80 of macropore section and form the capillary upper end and terminate in the second portion 82 than the aperture section of having of spray tip.Bigger diametric hole 80 is used to provide higher transporting velocity (with comparing in that the transporting velocity that can provide with the capillary of part 80 same holes sections is provided on its total length) and is used for strengthening the throttling action that near the spray tip electric field plays control flow direction spray tip simultaneously than the capillary portion 82 of minor diameter.By the length and the diameter of suitable selection capillary portion 82, can carry out accurate adjustment so that obtain the spraying of the best in given application scenario to electric field enhancing and liquid transporting velocity.
In addition, to be convenient to from the shape that the one end sprays be favourable if the spray tip of this pipe made with reference to the form of Fig. 2 and 3 and explanation.For example, as shown in Figure 4, this tube portion 82 cut sth. askew becomes to make its end face 50 to extend on the tangent plane of the outer round surface of the different axial locations in edge and this pipe, thereby has formed the front end 52 of an acute angle.On position antipodal, formed the tail end 54 at an obtuse angle with it.Near this front end electric field just is further strengthened like this, thereby helps from this locational injection.
Claims (28)
1. Elecstrostatic spraying apparatus, comprise a container that the liquid for the treatment of electrostatic spraying is housed, a capillary feed flow structure, one end of this structure is arranged in this container and its opposite end forms the spray tip of this device in use or combine with a spray tip of this device, and the device that is used for controlling the liquid level in this container in this container.
2. device as claimed in claim 1, it is characterized in that: this device that is used for controlling liquid level in the container is configuration like this, make capillary structure and the locational liquid level of fluid connection at least when the amount of liquid in this container is in preset range maintenance constant substantially.
3. device as claimed in claim 1 is characterized in that: this liquid level at least the amount of liquid in this container be lower than this container the design liquid capacity 40% before unaffected.
4. device as claimed in claim 1, it is characterized in that: this device comprises a separator, this separator is separated into two chambeies to the inside of this container together with the liquid in this container, basically first chamber and second chamber that is connected with external container that isolates with external container, this capillary structure is configured to pass this second chamber and extends out, thereby liquid can be transported on this spray tip by the bottom surface of this capillary structure from this second chamber.
5. device as claimed in claim 1 is characterized in that: this container, this capillary structure and this device are included in the interchangeable tube.
One kind in electrostatic spraying, use the tube, comprise a container that the liquid for the treatment of electrostatic spraying is housed, a capillary feed flow structure, one end of this structure is arranged in this container and its opposite end forms the spray tip of this device in use or combine with a spray tip of this device, and the device that is used for controlling the liquid level in this container in this container.
7. tube as claimed in claim 6 is characterized in that, this is a microscler tube along the bearing of trend of this capillary structure.
8. tube as claimed in claim 6 is characterized in that: this capillary structure ends near on the position of this bottom surface, and an electric contact is housed on this bottom surface, and this electric contact is used at the very near liquid effects high voltage of this capillary structure terminal.
9. tube as claimed in claim 6, it is characterized in that: this capillary structure is a kind of capillary.
10. tube as claimed in claim 6, it is characterized in that: this base plate is the structure that concaves, and its minimum point is positioned at the below of this capillary structure.
11. tube as claimed in claim 6 is characterized in that: the opposite end of this capillary structure is to help the unsymmetric structure that liquid sprays from a side of this structure.
12. tube as claimed in claim 6, it is characterized in that: between the opposite end of end face on this opposite end of this capillary structure, extend obliquely, thereby make this structure have one to be favourable front end from this injection in the one side so that this structure produces an asymmetrical shape in this structure.
13. device as claimed in claim 1, it is characterized in that: capillary structure is a kind of pipe, and provide the high-tension device of liquid effects, thereby the liquid that penetrates from this spray tip is atomized under electric field action, this pipe, this container and voltage acting device are included in the housing, this housing is suitable for stably being installed on the position, capillary is laid up and by capillarity liquid is transported to from fluid storage tank on this spray tip in this housing, this spray tip capillaceous has asymmetric shape, thereby helps the side injection of liquid from this pipe.
14. tube as claimed in claim 13 or device, it is characterized in that: the end face on this this opposite end capillaceous extends between the opposite side on this pipe diametric(al) obliquely, giving this pipe an asymmetrical shape, is favourable front end thereby make this pipe have one in the one side from this injection.
15. tube as claimed in claim 14 or device, it is characterized in that: this front end is an acute angle.
16. as claim 1 or 6 described tube or devices, it is characterized in that: this capillary is made up of polymeric material.
17. tube as claimed in claim 14 or device is characterized in that: the end face that this this inclination capillaceous is extended is the plane basically.
18. as claim 12 or 13 described tubes or device, it is characterized in that: the Electical connector that is used for connecting the high pressure acting device is installed in away from this spray tip place, thereby this voltage is transmitted on this spray tip by the liquid in this capillary.
19. as claim 12 or 13 described tube or devices, it is characterized in that: when vertically arranged this pipe was placed on uppermost position to this spray tip, this pipe can provide enough capillary water heights, and liquid is transported on this spray tip.
20. as claim 1 or 6 described tube or devices, it is characterized in that: this capillary structure comprises a capillary, this pipe has in succession first capillary portion that extends from an end of second capillary portion of a back, second capillary portion ends at or near this opposite end capillaceous and have a hole, the area of section in this hole is less than the area of section in the hole in the first.
21. tube as claimed in claim 20 or device, it is characterized in that: capillary structure comprises a capillary from extending very close to certain position of an end of this container, this pipe terminates in spray tip by the hole on the opposite end of this container, this capillary comprises in succession second capillary portion that extends from a described end of second capillary portion that is located on or near this spray tip of a back, this second capillary portion has a hole, and the sectional area in this hole is less than the sectional area in hole in this first.
22. tube as claimed in claim 20 or device, it is characterized in that: the external diameter of this first capillaceous is 400～800 microns.
23. tube as claimed in claim 20 or device, it is characterized in that: the internal diameter of this first capillaceous is 200～300 microns.
24. tube as claimed in claim 20 or device, it is characterized in that: the external diameter of this second capillary portion is 200～400 microns.
25. tube as claimed in claim 20 or device, it is characterized in that: the internal diameter of this second capillary portion is 50～100 microns.
26. as claim 1 or 6 described tube or devices, it is characterized in that: this capillary structure comprises a capillary, the wall thickness at this Guan Zaiqi spray tip place is not more than 400 microns.
27. tube as claimed in claim 26 or device, it is characterized in that: the wall thickness at this Guan Zaiqi spray tip place is not more than 250～300 microns.
28. tube as claimed in claim 26 or device, it is characterized in that: the wall thickness at this Guan Zaiqi spray tip place is not more than 100～150 microns.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9318175.8 | 1993-09-02 | ||
| GB939318199A GB9318199D0 (en) | 1993-09-02 | 1993-09-02 | Spraying device |
| GB9318176.6 | 1993-09-02 | ||
| GB9318199.8 | 1993-09-02 | ||
| GB939318175A GB9318175D0 (en) | 1993-09-02 | 1993-09-02 | Spraying device |
| GB939318176A GB9318176D0 (en) | 1993-09-02 | 1993-09-02 | Electrostatic spraying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1129914A CN1129914A (en) | 1996-08-28 |
| CN1071144C true CN1071144C (en) | 2001-09-19 |
Family
ID=27266833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94193195A Expired - Fee Related CN1071144C (en) | 1993-09-02 | 1994-08-22 | Electronstatic spraying device |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US5927618A (en) |
| EP (2) | EP0716626B1 (en) |
| JP (1) | JPH09502126A (en) |
| KR (1) | KR100346748B1 (en) |
| CN (1) | CN1071144C (en) |
| AT (2) | ATE186237T1 (en) |
| AU (1) | AU696929B2 (en) |
| CA (1) | CA2168436C (en) |
| DE (2) | DE69433798T2 (en) |
| GB (1) | GB9416581D0 (en) |
| HK (1) | HK1011307A1 (en) |
| TW (1) | TW282421B (en) |
| WO (1) | WO1995006521A2 (en) |
| ZA (1) | ZA946416B (en) |
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| WO2007009145A1 (en) * | 2005-07-20 | 2007-01-25 | Treibacher Industrie Ag | Ceria based glass polishing composition and a process for the manufacture thereof |
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- 1994-08-22 AT AT94924355T patent/ATE186237T1/en not_active IP Right Cessation
- 1994-08-22 DE DE69433798T patent/DE69433798T2/en not_active Expired - Fee Related
- 1994-08-22 WO PCT/GB1994/001829 patent/WO1995006521A2/en active IP Right Grant
- 1994-08-22 EP EP94924355A patent/EP0716626B1/en not_active Expired - Lifetime
- 1994-08-22 CN CN94193195A patent/CN1071144C/en not_active Expired - Fee Related
- 1994-08-22 KR KR1019960701057A patent/KR100346748B1/en not_active IP Right Cessation
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- 1994-08-22 US US08/592,418 patent/US5927618A/en not_active Expired - Fee Related
- 1994-08-22 CA CA002168436A patent/CA2168436C/en not_active Expired - Fee Related
- 1994-08-22 DE DE69421541T patent/DE69421541T2/en not_active Expired - Fee Related
- 1994-08-22 EP EP98200603A patent/EP0853980B1/en not_active Expired - Lifetime
- 1994-08-22 AT AT98200603T patent/ATE267052T1/en not_active IP Right Cessation
- 1994-08-22 AU AU74648/94A patent/AU696929B2/en not_active Ceased
- 1994-08-23 ZA ZA946416A patent/ZA946416B/en unknown
- 1994-08-31 TW TW083108031A patent/TW282421B/zh active
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Also Published As
| Publication number | Publication date |
|---|---|
| DE69421541D1 (en) | 1999-12-09 |
| CA2168436A1 (en) | 1995-03-09 |
| DE69421541T2 (en) | 2000-06-29 |
| EP0853980A2 (en) | 1998-07-22 |
| ATE267052T1 (en) | 2004-06-15 |
| CN1129914A (en) | 1996-08-28 |
| AU7464894A (en) | 1995-03-22 |
| WO1995006521A3 (en) | 1995-04-27 |
| EP0716626B1 (en) | 1999-11-03 |
| KR100346748B1 (en) | 2002-11-23 |
| ATE186237T1 (en) | 1999-11-15 |
| KR960704636A (en) | 1996-10-09 |
| JPH09502126A (en) | 1997-03-04 |
| AU696929B2 (en) | 1998-09-24 |
| DE69433798D1 (en) | 2004-06-24 |
| TW282421B (en) | 1996-08-01 |
| EP0853980A3 (en) | 1998-08-05 |
| US5927618A (en) | 1999-07-27 |
| DE69433798T2 (en) | 2005-06-09 |
| HK1011307A1 (en) | 1999-07-09 |
| CA2168436C (en) | 2004-05-04 |
| EP0716626A1 (en) | 1996-06-19 |
| GB9416581D0 (en) | 1994-10-12 |
| WO1995006521A2 (en) | 1995-03-09 |
| EP0853980B1 (en) | 2004-05-19 |
| ZA946416B (en) | 1995-03-02 |
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